Finding the Fourth Proportional to 21,279,528,194.34, 29,360,877,057.72 and 12,704,285,898.70

Step by Step Solution

1. Step 1: Write the proportion equation
   21,279,528,194.34 : 29,360,877,057.72 = 12,704,285,898.70 : x
2. Step 2: Convert to fraction form
   21,279,528,194.34/29,360,877,057.72 = 12,704,285,898.70/x
3. Step 3: Cross multiply
   21,279,528,194.34x = 29,360,877,057.72 × 12,704,285,898.70
4. Step 4: Simplify right side
   21,279,528,194.34x = 373,008,976,377,856,589,824
5. Step 5: Solve for x
   x = 373,008,976,377,856,589,824/21,279,528,194.34
6. Step 6: Final answer
   x = 17,529,005,952.17